Bon, c’est pas si facile. Aucun des groupes de pins ne semble en fait se connecter en UART. Il y a de l’USART, mais de toute façon aucun groupe de pins ne contient un ensemble cohérent de RX, TX et Ground.
Voici ce à quoi ils sont reliés sur le STM32:
J3
1 => rien
2 => 31 = PA10 / USART1_RX, TIM1_CH3, TIM17_BKIN, I2C1_SDA
3 => 22 = PB11 / USART3_RX, EVENTOUT, I2C2_SDA
4 => 23 = VSS
5 => 2 = PC 13 / WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT
6 => ground
J8
1 => ground
2 => 7 = NRST / RST (reset)
3 => 6 = PF1-OSC_OUT, I2C1_SCL, OSC_OUT
4 => 9 = VDDA
5 => 12 = PA2 / USART2_TX, TIM15_CH1, ADC_IN2, WKUP4
J9
Pas de ground
1 => 40 = PB4 / SPI1_MISO, TIM17_BKIN, TIM3_CH1, EVENTOUT
2 => 39 = PB3 / SPI1_SCK, EVENTOUT
3 => 38 = PA15 / SPI1_NSS, USART2_RX, USART4_RTS, EVENTOUT
4 => 37 = PA14 / USART2_TX, SWCLK
5 => 34 = PA13 / IR_OUT, SWDIO, USB_NOE
6 => 33 = PA12 / USART1_RTS, TIM1_ETR, EVENTOUT / USB_DP
J10
Pas de ground
1 => 12 = PA2 / USART2_TX, TIM15_CH1, ADC_IN2, WKUP4
1 => 21 = PB10 / SPI2_SCK, USART3_TX
1 => 36 = VDD
1 => 48 = VDD
2 => 16 = PA6 / SPI1_MISO, TIM3_CH1, TIM1_BKIN, TIM16_CH1, EVENTOUT, USART3_CTS / ADC_IN6
3 => 27 = PB14 / SPI2_MISO, I2C2_SDA, TIM1_CH2N, TIM15_CH1, USART3_RTS
4 => 28 = PB15 / SPI2_MOSI, TIM1_CH3N, TIM15_CH1N, TIM15_CH2 / WKUP7, RTC_REFIN
J11 (pas de pins)
1 => 19 = PB1
2 => 46 = PB9
3 => ground
4 => 1 = VDD
5 => 48 = VDD
Je suis donc bloqué pour l’instant sur cette piste.